According to the elasTc rebound hypothesis, most earthquakes are produced by the rapid release of energy stored in rock that has been subjected to great forces. When the strength of the rock is exceeded, it suddenly breaks, releasing some of its stored energy as seismic waves. AFershocks and Â±oreshocks Even a great earthquake like the 1906 San Francisco earthquake usually does not release all the elasTc energy stored in the rock along a fault.
Type rating. A type rating is a regulating agency's certification of an airplane pilot to fly a certain aircraft type that requires additional training beyond the scope of the initial license and aircraft class training. What aircraft require a type rating is decided by the local aviation authority.
Are diesel additives necessary? We obtained the results of a laboratory test done on Masco diesel versus a competitorâs diesel that promotes their special additive and the results are not surprising to us. The most important rating in diesel is called the cetane Index and the higher the rating the better. Mascoâs cetane rating was 51.01 and our competitorâs with the special additive was 43.4. The best part of this test is that Masco did not request the testing to be done nor were we aware that it was being conducted.